If you regularly work out in gear made of high-tech fabric, you might want to consider picking up some Penguin Sport Wash, or Win Sport Detergent.

I figured out pretty quickly that normal detergent just doesn't get the stank out of my gear, and using fabric softener ruins the wicking ability of the fabric in relatively few washes. Penguin and Win get the smell out and do not reduce the performance or lifespan of the gear. I've got bottles of both and they each seem to work well (haven't picked my favorite yet, but Runners World prefers Penguin). Also, never wash your workout gear with your other laundry...unless you want all of your other clothes to smell like you just worked out.